/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package presentation.controller.adminServlet;

import business.PostManageService;
import business.PostManageServiceImpl;
import presentation.controller.adminServlet.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Date;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import data.DAO.PostDAO;
import model.entity.Post;

/**
 *
 * @author ninkuhack: Quản lý post của admin, liệt kê các post của người dùng,
 * cho phép xóa post bất kỳ Tâm thực hiện
 */
@WebServlet(name = "PostManagementServlet", urlPatterns = {"/PostManagementServlet"})
public class PostManagementServlet extends HttpServlet {

    PostManageService pms = new PostManageServiceImpl();

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet PostManagementServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet PostManagementServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        showAllPost(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String action = request.getParameter("action");
        if ("search".equals(action)) {
            String keyword = request.getParameter("s");
            List<Post> result = pms.find(keyword);
            request.setAttribute("result", result);
            request.getRequestDispatcher("postmanage.jsp").forward(request, response);
        } else {
            String[] selectID = request.getParameterValues("selected");
            for (String obj : selectID) {
                int post_id = Integer.parseInt(obj);
                if (deletePost(post_id) == false) {
                    request.setAttribute("error", "Error when delete post");
                    request.getRequestDispatcher("postmanage.jsp").forward(request, response);
                }
            }
            showAllPost(request, response);
        }

    }

    private void showAllPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
        List<Post> posts = pms.showAllPosts();
        request.setAttribute("posts", posts);
        request.getRequestDispatcher("postmanage.jsp").forward(request, response);
    }
    public List<Post> searchPostByDate(Date created_date) {
        return pms.findByDate(created_date);
    }

    public boolean deletePost(int post_id) {
        return pms.delete(post_id);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
